The incoming transactions controller now uses the `chainId` for the
current network instead of the `networkId`. This ensures that custom
RPC endpoints for the built-in supported networks do correctly receive
incoming transactions.
As part of this change, the incoming transactions controller will also
cease keeping track of the "last block fetched" for networks that are
not supported. This piece of state never really represented the last
block fetched, as _no_ blocks were fetched for any such networks. It
been removed.
* Delete localhost provider type
* Use ganache-cli default chain ID for tests
* Delete unused test firstTimeState variable
* Migrate default ganache-cli network to frequentRpcListDetail
* Add default test provider state
* Add test functionality to createJsonRpcClient
* Lint locales
* Update test middleware creation
* fixup! Update test middleware creation
